. >> reporter: in san francisco, news chopper 2 was overhead after flootding shut down an entire side of the great highway. the two-mile stretch spanning from lincoln to slope shut down early this afternoon. you can see cones and cars driving through a substantial amount of water. and back here in oakland, the folks who live here tell me they're unsure of what's going to happen to this tree but without this -- but at this point, they're without their rides. >>> about two hours ago, pg&e restored power to all customers following a large outage after a crash in oakland. the crash happened around 2:00 this morning. it knocked down power lines and caused an outage affecting some 6800 customers. pg&e said most customers were back online within about an hour and a half. about 2400 customers remain in the dark until about two years ago. >>> the first snow fell in the sierra today. ken prich set live along interstate 08 and experienced first hand just how slow going the traffic was on the way up. ken? >> reporter: we did, indeed. you can see light snow falling. we are at the nyack gas station